def f(x0, y0, x1, y1, z0, z1):
    x = x0 + (x1-x0) * z0 * pow(z0-z1, -1, mod) % mod
    x %= mod
    y = y0 + (y1-y0) * z0 * pow(z0-z1, -1, mod) % mod
    y %= mod
    return x, y, x0 + (x1-x0) * z0 / (z0-z1), y0 + (y1-y0) * z0 / (z0-z1)
mod = 998244353
for _ in range(int(input())):
    A = list(map(int, input().split()))
    B = list(map(int, input().split()))
    C = list(map(int, input().split()))
    L = list(map(int, input().split()))
    ax, ay, ax0, ay0 = f(L[0], L[1], A[0], A[1], L[2], A[2])
    bx, by, bx0, by0 = f(L[0], L[1], B[0], B[1], L[2], B[2])
    cx, cy, cx0, cy0 = f(L[0], L[1], C[0], C[1], L[2], C[2])
    if (bx0-ax0) * (cy0-ay0) - (cx0-ax0) * (by0-ay0) < 0:
        ans = -((bx-ax) * (cy-ay) - (cx-ax) * (by-ay))
    else:
        ans = (bx-ax) * (cy-ay) - (cx-ax) * (by-ay)
    ans = ans * pow(2, -1, mod) % mod
    print(ans)